ASME Code Case 181

Charlie Chong
GENERAL NOTES:
(a)t = thickness of the weld excluding any allowable reinforcement. For a
buttweld joining two members having different thickness at the weld, t is the
thinner of these two thicknesses. If a full penetration weld includes a fillet
weld, the thickness of the throat t of the fillet weld shall be included
in t.
(b)A subsurface indication shall be considered as a surface flaw if separation
(S in Fig. 1) of the indication from the nearest surface of the component is
equal to or less than half the through thickness dimension (2d in Fig. 1,
sketch [b]) of the subsurface indication.
(c)If the acceptance Criteria in this table results in a flaw length, l , less than
6.4 mm (0.25 in.) , a value of 6.4 mm (0.25 in.) may be used.
(d)for intermediate flaw aspect ratio a/l and thickness t (64 mm [2 1/2 in] < t <
100 mm [4 in.]) linear interpolation is permissible.